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to a standalone deployment model. It is no longer an optional component pre-baked into the OS features list and must be downloaded as a dedicated installer. Microsoft Dev Blogs Official Standalone Download: You can find the latest version on the official Microsoft Download Center Service Pack 1 (Full Package):

Use the DISM tool to install the feature from the mounted ISO. Replace D: with your actual drive letter:

Dism /online /enable-feature /featurename:NetFX3 /All /Source:X:\sources\sxs /LimitAccess Use code with caution. Command Parameters Explained: to a standalone deployment model

After a couple of minutes, the command prompt said: “The operation completed successfully.”

This indicates a Secure Boot or BIOS issue. Replace D: with your actual drive letter: Dism

Even with an offline installer, things can go wrong. Here is how to fix the most frequent errors.

DISM (Deployment Imaging Service and Management Tool) is a powerful command-line tool built into Windows for servicing and preparing Windows images. It will be used to install the .cab file. Here is how to fix the most frequent errors

DISM is trying to reach Windows Update despite the offline command. Fix: You must force the group policy. Open gpedit.msc (Group Policy Editor). Navigate to Computer Configuration > Administrative Templates > System > Specify settings for optional component installation and component repair . Enable the policy and check the box: "Download repair content and optional features directly from Windows Update instead of Windows Server Update Services (WSUS)." Then re-run the offline command.

Check the box next to . Click OK and follow the prompts on the screen. Download the Official Packages From Microsoft

Type optionalfeatures and press . This opens the Windows Features window.

: Type the following command, replacing D: with your specific drive letter: